A petroleum-based lubricant and/or a soap-based lubricant are not good for rubber over the long term.
A silicone-based lubricant is not good around painted parts or around a paint shop (if you plan to paint or re-paint any time soon).
A a water-based, water-soluble, personal lubricant is the best choice. K-Y Jelly is a name brand but there are many store brands that are just as good and just as safe for use around rubber products.
